Which metabolic consequence arises when photorespiration reduces carbon fixation efficiency via rubisco?

💡 Explanation

When photorespiration occurs, Rubisco catalyzes the reaction of RuBP with O2 instead of CO2, leading to synthesis of phosphoglycolate, requiring ATP-dependent salvage pathways. Therefore increased ATP consumption during scavenging results, rather than NADPH synthesis, chlorophyll elevation, or optimized respiration, which are independent processes.

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